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Re: Fw: [GWL] USDA Climate Map & Canada Gardens to Visit

I can understand phase 1, but how will phase 2 be codified?


----- Original Message ----- 
From: "Marge Talt" <mtalt@hort.net>
To: <gardenchat@hort.net>
Sent: Tuesday, August 31, 2004 1:48 AM
Subject: [CHAT] Fw: [GWL] USDA Climate Map & Canada Gardens to Visit

> This is the 2nd post...
> Marge
> ----------
> > From: Jo Ellen Meyers Sharp <hoosiergardener@earthlink.net>
> > To: Garden Writers -- GWL -- The Garden Writers Forum
> > Date: Monday, August 30, 2004 10:32 PM
> >
> This just in from the Weekly Nursery & Management newsletter e-mail
> New Zone Map will be more accurate The revised version of the USDA
> Hardiness Zone map will have many improvements, use more data and be
> more accurate, said <mailto:tony@plantdel.com>Tony Avent, owner of
> Plant Delights Nursery in Raleigh, N.C., and a member of the map's
> advisory board. The new map will be issued in two phases. Phase 1
> will show average annual low temperatures by zone in 5-degree
> increments (a and b designations) and use weather data from the last
> 30 years. The current map, issued in 1990, uses 12 years of data. The
> new map will better reflect coastal and lake effects and urban heat
> islands, Avent said. Phase 2 will incorporate overlay maps to reflect
> factors such as duration of cold, summer heat factors and possibly
> airflow patterns.
> jems
> ---------------------------------------------------------------------
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